[IronCanine]

This thread is obviously self serving, in that we want to do what is most likely correct for our build...an Oct/Nov of 68 St. Louis 4WD truck. Without knowing for sure, I'd bet the Blazer above was built in St. Louis based on the firewall handwriting. It would make sense to me that with the 69 engine changes, early MY trucks might not have had them and later MY trucks might have. My instinct is that our truck would not have had a heat stove and would have had a white decal on the breather. And with regard to a curved dipstick on a 69 4X4....I can't find an example at this point. What am I missing? Thanks in advance for any insight.